
//*****************************************************************************
// system functions

function serialize( mixed_value ) {
    // http://kevin.vanzonneveld.net
    // +   original by: Arpad Ray (mailto:arpad@php.net)
    // +   improved by: Dino
    // +   bugfixed by: Andrej Pavlovic
    // +   bugfixed by: Garagoth
    // %          note: We feel the main purpose of this function should be to ease the transport of data between php & js
    // %          note: Aiming for PHP-compatibility, we have to translate objects to arrays
    // *     example 1: serialize(['Kevin', 'van', 'Zonneveld']);
    // *     returns 1: 'a:3:{i:0;s:5:"Kevin";i:1;s:3:"van";i:2;s:9:"Zonneveld";}'
    // *     example 2: serialize({firstName: 'Kevin', midName: 'van', surName: 'Zonneveld'});
    // *     returns 2: 'a:3:{s:9:"firstName";s:5:"Kevin";s:7:"midName";s:3:"van";s:7:"surName";s:9:"Zonneveld";}'
 
    var _getType = function( inp ) {
        var type = typeof inp, match;
        var key;
        if (type == 'object' && !inp) {
            return 'null';
        }
        if (type == "object") {
            if (!inp.constructor) {
                return 'object';
            }
            var cons = inp.constructor.toString();
            if (match = cons.match(/(\w+)\(/)) {
                cons = match[1].toLowerCase();
            }
            var types = ["boolean", "number", "string", "array"];
            for (key in types) {
                if (cons == types[key]) {
                    type = types[key];
                    break;
                }
            }
        }
        return type;
    };
    var type = _getType(mixed_value);
    var val, ktype = '';
 
    switch (type) {
        case "function": 
            val = ""; 
            break;
        case "undefined":
            val = "N";
            break;
        case "boolean":
            val = "b:" + (mixed_value ? "1" : "0");
            break;
        case "number":
            val = (Math.round(mixed_value) == mixed_value ? "i" : "d") + ":" + mixed_value;
            break;
        case "string":
            val = "s:" + mixed_value.length + ":\"" + mixed_value + "\"";
            break;
        case "array":
        case "object":
            val = "a";
            /*
            if (type == "object") {
                var objname = mixed_value.constructor.toString().match(/(\w+)\(\)/);
                if (objname == undefined) {
                    return;
                }
                objname[1] = serialize(objname[1]);
                val = "O" + objname[1].substring(1, objname[1].length - 1);
            }
            */
            var count = 0;
            var vals = "";
            var okey;
            var key;
            for (key in mixed_value) {
                ktype = _getType(mixed_value[key]);
                if (ktype == "function") { 
                    continue; 
                }
 
                okey = (key.match(/^[0-9]+$/) ? parseInt(key) : key);
                vals += serialize(okey) +
                        serialize(mixed_value[key]);
                count++;
            }
            val += ":" + count + ":{" + vals + "}";
            break;
    }
    if (type != "object" && type != "array") val += ";";
    return val;
}

function implode( glue, pieces ) {  

   return ( ( pieces instanceof Array ) ? pieces.join ( glue ) : pieces );  
} 

function trim(str, chars) {
	return ltrim(rtrim(str, chars), chars);
}
 
function ltrim(str, chars) {
	chars = chars || "\\s";
	return str.replace(new RegExp("^[" + chars + "]+", "g"), "");
}
 
function rtrim(str, chars) {
	chars = chars || "\\s";
	return str.replace(new RegExp("[" + chars + "]+$", "g"), "");
}

function lpad(ContentToSize,PadLength,PadChar)
{
	var PaddedString=ContentToSize.toString();
	for(i=ContentToSize.length+1;i<=PadLength;i++)
	{
		PaddedString=PadChar+PaddedString;
	}
	return PaddedString;
}

function rpad(ContentToSize,PadLength,PadChar)
{
	var PaddedString=ContentToSize.toString();
	for(i=ContentToSize.length+1;i<=PadLength;i++)
	{
		PaddedString=PaddedString+PadChar;
	}
	return PaddedString;
}

function str_ireplace( f_needle, f_replace, f_haystack ){	// Case-insensitive version of str_replace().
    // +	 original by: Martijn Wieringa

    var result = '';
    var index = 0;

    var haystack = f_haystack.toLowerCase();
    var needle = f_needle.toLowerCase();

    while((index = haystack.indexOf(needle)) > -1){
        result += f_haystack.substring(0, index);
        result += f_replace;

        haystack = haystack.substring(index + f_needle.length);
        f_haystack = f_haystack.substring(index + f_needle.length);
    }
    return result + f_haystack;
}

function explode( delimiter, string ) {	// Split a string by string
	// 
	// +   original by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
	// +   improved by: kenneth
	// +   improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)

	var emptyArray = { 0: '' };

	if ( arguments.length != 2
		|| typeof arguments[0] == 'undefined'
		|| typeof arguments[1] == 'undefined' )
	{
		return null;
	}

	if ( delimiter === ''
		|| delimiter === false
		|| delimiter === null )
	{
		return false;
	}

	if ( typeof delimiter == 'function'
		|| typeof delimiter == 'object'
		|| typeof string == 'function'
		|| typeof string == 'object' )
	{
		return emptyArray;
	}

	if ( delimiter === true ) {
		delimiter = '1';
	}

	return string.toString().split ( delimiter.toString() );
}


function isset () {
    // !No description available for isset. @php.js developers: Please update the function summary text file.
    // 
    // version: 1009.2513
    // discuss at: http://phpjs.org/functions/isset    // +   original by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
    // +   improved by: FremyCompany
    // +   improved by: Onno Marsman
    // +   improved by: Rafał Kukawski
    // *     example 1: isset( undefined, true);    // *     returns 1: false
    // *     example 2: isset( 'Kevin van Zonneveld' );
    // *     returns 2: true
    
    var a = arguments, l = a.length, i = 0, undef;    
    if (l === 0) {
        throw new Error('Empty isset'); 
    }
        while (i !== l) {
        if (a[i] === undef || a[i] === null) {
            return false; 
        }
        i++;     }
    return true;
}

function explode( delimiter, string ) {	// Split a string by string
	// 
	// +   original by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
	// +   improved by: kenneth
	// +   improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)

	var emptyArray = { 0: '' };

	if ( arguments.length != 2
		|| typeof arguments[0] == 'undefined'
		|| typeof arguments[1] == 'undefined' )
	{
		return null;
	}

	if ( delimiter === ''
		|| delimiter === false
		|| delimiter === null )
	{
		return false;
	}

	if ( typeof delimiter == 'function'
		|| typeof delimiter == 'object'
		|| typeof string == 'function'
		|| typeof string == 'object' )
	{
		return emptyArray;
	}

	if ( delimiter === true ) {
		delimiter = '1';
	}

	return string.toString().split ( delimiter.toString() );
}

function in_array(needle, haystack, strict) {	// Checks if a value exists in an array
	// 
	// +   original by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)

	var found = false, key, strict = !!strict;

	for (key in haystack) {
		if ((strict && haystack[key] === needle) || (!strict && haystack[key] == needle)) {
			found = true;
			break;
		}
	}

	return found;
}


function getWindowHeight() {
     if (self.innerHeight) return self.innerHeight;
     if (document.documentElement && document.documentElement.clientHeight)
         return document.documentElement.clientHeight;
     if (document.body) return document.body.clientHeight;
	        return 0;
 }

 function getWindowWidth() {
	    if (self.innerWidth) return self.innerWidth;
	    if (document.documentElement && document.documentElement.clientWidth)
	        return document.documentElement.clientWidth;
	    if (document.body) return document.body.clientWidth;
	        return 0;
 }


function dump(arr,level) {
	var dumped_text = "";
	if(!level) level = 0;

	//The padding given at the beginning of the line.
	var level_padding = "";
	for(var j=0;j<level+1;j++) level_padding += "    ";

	if(typeof(arr) == 'object') { //Array/Hashes/Objects
		for(var item in arr) {
			var value = arr[item];

			if(typeof(value) == 'object') { //If it is an array,
				dumped_text += level_padding + "'" + item + "' ...\n";
				//dumped_text += dump(value,level+1);
			} else {
				dumped_text += level_padding + "'" + item + "' => \"" + value + "\"\n";
			}
		}
	} else { //Stings/Chars/Numbers etc.
		dumped_text = "===>"+arr+"<===("+typeof(arr)+")";
	}
	return dumped_text;
}



